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April 15 1929. H. JUNGK 1, 9,3 3

4 sass-r FEEDING moans Filed Oct. 25, 1926 5 Sheets-Sheet 1 men for Illa/nay a? April .16, 1929. H JUNGK I 1,709,353

SHEET FEEDING MACHINE Filed Oct. 25, 1926 3 Sheets-Sheet *2 l/uqo Zmgk Jn venfor April 16,1929. JUNGK 1,709,353

SHEET FEEDING MACHINE Filed Oct. 25, 1926 3 Sheets-Sheet 3 7 k @ZZSJ qllorney Patented Apr. 16, 1929.-

UNITED STATES 1,709,353 PQATE N T- or Flee.

HUGO JUNGK,OF EIREURT, GERMANY.

SHEET-FEEDING MACHINE.

Application filed October 25, 1926, Serial No. 144,017, and in Germany October-28, 1825.

With rulingmachines and the like the sheets of paper are withdrawn, as is known,

from a pile supported u, on a stationary table by-means of a with rawing device, and

5 are then introduced into the respective ma: chine. The withdrawing deviceis formed generally by a two-wheeled carriage-composed of a bow provided with two wheels having rubber'tyres, that carria e being reciprocated upon that sheet whic is the uppermost of the-pile at the time'being,-its

to-and-from movement being efiected by a connecting rod. The said-wheels are pro vided with a checking -.-device preventing them "from 'irotation when the, carriage is drawn-towards the machine the adhesion of the rubber tyres on the uppermost sheet of paper withdrawing this sheet from the pile 4 and conveying it to the conveying threadsof the respective machine (ruling machine or the like). In order to, prevent that more than onesheet is withdrawn from the pile, there are pile small nives or needles attached loosely ,25 to vertical rods and bearing with' their pointed ends upon the ile and piercing through the uppermost s eet because they are subjected to the ressure' of a suitably arranged weight. he up ermost sheet 3 which is tobe withdrawn b t e above-mentioned carriage with the ai of the adhesion, as stated, must, therefore, betorn away from said knives or needles, and this bein so there remain fibres, as well as scraps, o paper that are carried into the ruling machine and'impair its operation, especially the product. The fibres and scraps adhere chiefly to the ruling rolls whereby the ruling lines pro-' object by an improved method consisting in vaulting the uppermost sheet at its rear rim, the next sheet being thereby so much exposed, that a pressing member. can be brought to bear on it, this member retaining the remaining sheets when the said carriage the uppermost. sheet.

some-adjacent members, and shows the'uprovided at the rear edge of the that pile. When the carriage is movedto the is drawn towardsthe machine? together with,

The invention is carried into-practice by the device illustrated diagrammatically and by way of example on the. accompanying drawings in Figs. 2-8, whereas Figure 1 shows the old device in which, knives or needles are,employed; Figure 2'is a side new of a low pile of sheets, together with permost sheet vaulted according to the present invention; Figure .3 is a plan of the parts shown in Fig.2; FigureA; is a front view of a devlce for *efiectin "the vaulting in question;- Figure 5 is a p an of this device; Figare 6 ishows itfi'om' the. le ft,- and Figure 7 shows it from the right, all as fully described hereinafter. Fi 8 is a cross-section on the line VIII-,VIII ':in Fig. 4 the vaulting member being swung into the other position and lifted 0th The pile of. paper 1 is supported upon a stationary table 5. The two-wheeled sheet withdrawing carriage 2 is moved rearwardly and forwardly upon right (Figs. 1 and 2), its wheels roll freely over the paper; when it is moved to the left,- the wheels are checked and pull the uppermost sheet of paper with'it, as already explained in the introductory part of this specification. While the carriage is moved to the right, the uppermost sheet is vaulted by a suitably formed and actuated member 6, and as the rear edge of the sheet is shifted tothe left thereby, the righthand rim of the next sheet is exposed and a pressing member 7'is lowered down upon that sheet whereby the ile is retained.

. T ere may be formed either only a partial vault, as in Fig. 3, or a complete vault by the use of two members 6, one on one side, the other on the other side of the sheet. The vault may be formed by a merely mechanically acting member like 6, whereby merely friction or adhesion, or friction and adhesion will be active, or the member 6 or any other member may be so designed as to be able to effect a sucking action in order to make the sheet adhere suflicientlystronglyto it. If a vault or vaults shall be formed only at the corners of the sheet, the shiftin member 6 or its equivalent can be move besides parallel to the carriage, also obliquely or even at right angles, thereto. An undesiredshifting of the entire sheet, without forma- 110 I tween the improved method disclosed in the the many precaution as regards a possible shifting of the entire sheet. The finger 8 presses upon the sheet while the member 6 forms the vault, but is lifted off the sheet immediately before the carriage moves to the left. Moving the member 6. back into its initial position after the vaulting of the paper must beeifected, of course, in such a manner that it does not comein contact with the paper and. displaces it. v

Before proceeding I refer briefly to 'Fi 1 in order to make clear the difference be preceding two paragraphs, and the old one.

In Fig. 1, 1 denotes the pile, 2, the carriage, 3 the needle (there are, in fact, two needles, althou h only one is visible in the figure), and 4t e rods to which the needles, which are suitably weighted, are attached. The-manner of o eration of this device has been described a ready in the paragraph, following immediately the preamble to this specification.

It is obvious that a variety of mechanisms may be designed to move the shifting of vaultin member 6 or its equivalent in the required member. I An example ofvone' of ossible constructional forms is shown in igs. 4-8 in which 9 denotes a casting shoved loosely upon two vertical rods 11 aflixed to the pile table 10.- The casting 9 has vertical bores in which bolts 12 and 13 are movable and subjected to the pressure of helical springs enclosed in said bores above said bolts. The upper portion of the casting 9 forms two bearin s 14 supporting a horizontal shaft 15. The res mentioned are so located in the casing with respect to the shaft 15 that one lies on one side, the other on the other side of the same,

3 The shaft 15 carries twofin ers 16 which are firmly aflixed to it, curve and extend into the upper ends of the said bores where they bear upon the upper ends of the said bolts. To one of the ends of the shaft 15 is secured an obliquely upwards extending.

arm 18, and the other shaft end is connected with the sheet shifting or vaulting device described hereinafter. The arm 18 1s swung to and fro by a connecting rod 19, and the bolts 12 and 13 are alternately lifted and lowered, that is to say, lifted off the sheet of paper and pressed down upon it, the lifting being effected by the respective spring which had been compressed by the vertical movement of the respective finger 16. The lowerend of each bolt is provided with a rubber foot. After the one or the other bolt has been depressed, it is checked bya spring-actuated slide-bolt 22.

Each of these slide-bolts has a here through which the respective pressing bolt 12 or 13 extends when being in its upper position. If the respective pressing bolt' has, however, been depressed, the appertaining slidebolt is shifted by the spring appertaining to it s so that its bore is then located excentrically to 'the bore in which the respective pressing bolt is guided whereby this latter is checked. The checking is maintained until a lug 16, or 17 respectively, made integral with the finger. 16, or 17 respectively, contacts with the respective slide-bolt and shifts it back into its initial position, whereby the respective pressing bolt is released and is, lifted by the appertaining spring. While the shaft 15 is turned in that direction in' which the arm 18 is moved to Wards the pile, the bolt 13 is moved away from this latter, and when the arm 18 moves in the other direction, the bolt 12 is moved away from the pile. The weight of the device is carried, therefore, alternately 'by the bolt 12 and the bolt 13. 1

Concerning now the vault-forming device,

this consists of an oscillating link 23 and the vaulting member roper 24/24, the member 24 being curve as shown in Fig. 7, and the member 24 consisting of rubber and having wedge-like shape, also as shown. The link 23 encloses a block 25 located upon an overhanging end of the shaft 15. The link 23 and the vaultin member 24/24 are connected with each ot er by a spindle 26 extending through the entire height of the link and the block, and having at its lower end a thread upon which the member 24 is screwed, whereas the upper end is provided with a grip 26*. That portion of the spindle 26 located between the lower face of said block and the opposite inner face of the link is encompassed by a helical spring 26 which constantly tends to press the link downwards. In the lowermost position of the link the rubber foot 24 bears upon the pile, i. e. upon the uppermost sheet of the same, but it is never loaded with the weight of the casting 9 with its appertaining parts.

The spindle 26 can be turned by means of the grip 26 whereby the pressure with which the vaulting member 24/24 presses uponthe paper can be varied. In order to prevent the vaulting member from turning when the spindle is turned, it is vertically guided by two pins 27 extending down from the link 23 into bores provided in the said vaulting member. v

The manner of action of the vaulting member with respect to the uppermost sheet of aper of the pile is accurately that descri ed with respect to the member 6 in Figs. 2 and 3. When it is moved to the left (Fig. 7), it produces a vault in said sheet or, more precisely, in acorner 'of the same, the main portion of the paper being held most sheet is withdrawn by the withdrawing carriage 2 (Figs. 2 and 3). Prior to this withdrawing the vaulting member is lifted a little which is effected by means of a roll 28 that is attached to the link 23 at a, sideof the same and runs along upon a curved projection,9 of the casting 9. i It is suited to the purpose to attach the roll 28 not directly to the link 23 but to a check 28 adjustable at the link whereby it is rendered possible to lift the vaulting member 2 1/24 a little earlier or a little later after the formation of the -vault in the paper.

The vaulted member is locked in its lifted position by a spring-actuating lever 29 which is provided with a rest 29 and sits loosely upon the shaft 15, the spring 29 which actuates'said lever being connected at one end with the same-and at the other end with the link 23, and the said'lever engaging in the proper moment a pin 30 projecting forth from the said link.- When the vaulting.

member swings back intoits-initial position it or, more precisely, its rubber foot (24) is remote from the pile, i. e. a little above .it. The lever 29 takes part in the swinging movement, but near the end of its backward movement it is retained by an adjusting screw 31 carried by an arm 32 hinged to, the casting 9. Owing to the lever 29 being retained by said arm and screw in the proper moment, the pin 30' leaves the rest 29 so that the vaulting member is depressed. by the spring 26 and its rubber foot contacts again with the paper. If the arm 32 is turned to the side so that the screw 31 is withdrawn from the path of the lever 29 the vaulting member remains lifted and swings to and fro without touching the .paper. i

33 is a hook which is hinged to the casting 9 and by. means of which the entire vaulting device can be attached to the upper endof one of the rods 11 after having been shifted upwardly along them.

Finally, I wish it to be understood that instead of the purely -mechanically acting vaulting member 2 t/2 l a so-called suction head may be, employed which makes the paper adhere to it by suction. Y

I claim: 1. In a sheet feeding machine, the combination of a paper-table, with front feeding devices, a twin-socket loosely mounted uponvertical rods of said paper-table, two spaced.

spring-actuated stamp-like pressing fingers vertically shiftable in .es provided within said socket, a strok mounted on said twin ket, andmeans for alternatelymoving up and down said pressuckler rotatably ing fingers so as to alternately carry said twin-socket.

2. A sheet feeding machine, as specified by claim 1, wherein a spring-actuated arm is hinged to the twin-socket, said arm carrying at its lower end a curved vaulting member provided with a rubber foot adapted to engage the upper sheet of a pile of paper placed on the paper-table.

3. A sheet feeding machine as specified by claim having a shaft carried by the twin-socket, an arm adapted to rock said shaft, a rod operativcly connected to the driving. gear for said machine, said shaft being provided at one of its ends with a sector-shaped member and cams for alternately depressing the pressing fingers, slide bolts for checking the motion of said pressing fingers when in depressed condition, and a projection for releasin the respective bolts after having effected t 1e pressing action ofsaid fingers.

4. A sheet feeding machine as specified by claim 1, having a rocking shaft carried by the twin-socket, an arm adapted to rock said shaft, a rod operatively connected to the driving gear for said ma hinc, said rocking shaft bearing at one of its ends a sectorshaped'member and being provided with cams for alternately depressing the pressing fingers, slide bolts for checking the motion of said pressing fingers when in depressed condition, a .pro'ection for releasing the respective bolts a ter efi'ected pressing action of said fingers, springs for actuating said slide bolts, and a bore provided on said slide bolts, said bore serving for the passage of the respective ressing finger.

5. A sheet ceding machine as specified by claim 1, havinga rocking shaft carried by the twin-socket and adapted to be rocked by an arm, a rod operatively connected to the driving gear forsaid machine, said rocking shaft bearing at one of its ends a sector-shaped member and being provided with cams for alternately depressing the pressing fingers, slide bolts for checking the motion of said pressing fingers when in depressed condition, and a projection for releasing the respective bolts after eflected pressing action of said fingers, said sectorshaped member forming a link and enclosingia block attached to one end of said shaft, an a spring tending to move said link back into its normal tion.

6. A sheet feeding machine as specified by claim 1, having a rocking shaft carried by the twin-socket, a: spring-actuated arm adapted'to rock said shaft, a rod adapted to be. operated by the driving gear for said machine, said rocking shaft bearing at one of its ends a sector-shaped member and being provided with cams for alternately depress-- ing the pressing fingers, slide. bolts for posltion after every actuachecking the motion of said pressing fingers fected presslng action of said fingers, said spring-actuated arm carrying a roller contacting with the upper surfaceof the twinsocket near the end of the stroking move.-

ment, a memberadapted to withdraw and lock said arm and to be pressed back at theend of the idle back stroke, and anadjusting screw contacting therewith.

7. A sheet feeding machine as specified by claim 1, having a rocking shaft carried by' the twin-socket, a spring-actuated arm adapted to rock said shaft, a rod adapted to be operated by the driving gear for said machine, said rocking shaft bearing at one of its ends a sector-shaped member and being provided with cams for alternately depressing the pressing fingers, slide bolts for checking the motion of sai pressing fingers when in depressed condition, a projection for releasing the res ective bolts after effectedpressing action 0 said fingers, said spring-actuated arm carrying a roller adj ustably mounted thereon and contacting 'with the upper surface of the'twin-socket near the end of the stroking movement, a mem- 1 her adapted to withdraw and lock said arm and to be pressed back at the end of the idle back stroke, and an adjusting screw contacting therewith.

8. A sheet feeding machine as specified pressing the pressing fingers, slide bolts for checking the motion of said pressing fingers when in depressed condition, a projection for releasing the respective bolts after ef-- fected pressing action offisaid fingers, said spring-actuated arm carrying a roller contacting with the upper surface of the twinsocket near the end of the stroking movement, a member adapted to withdraw and lock-said arm, and to be ressed back at the end of the idle back stro e, and an adjusting scre'wo contacting therewith, said arm consisting of two parts which are adjustable with respect to each other so as tovary the pressure of the stroking buckler upon the pile of paper placed on the paper-table.

In testimony whereof I aflix my signature.

HUGO JUNGK. 

